overstress
......and Sword, or Cirrus is the CAA approved method for deciding what fuel we carry. So if we carry "Sword" then that is legal minimum fuel. Over and above what the pink CAA form says. So this 20 minutes does not apply to those of us who use Sword or Cirrus to uplift fuel.
In fact you can carry less than Sword, because all you have to carry is sufficient for the flight. If the commander decides that is less than Sword, he can.
I remember "Dangerous Dave" who fought his way to the top of the fuel league table, by always carrying less than Sword. Until one day he gave himself a terrible fright. After that he drifted down the table!
I now seem to have confused myself.
L337